He didn't break Mosley down, didn't knock him down, or have him running for his life. Mosley was just too hesitant and was basically showing signs of being mentally shot. Mayweather does not hit hard enough or put his punchers together good enough to stop Cotto. Even against Mosley, Mayweather was throwing 1-2's then break...1...then break...1-2 then break.....Is that your idea of walking guys down, and breaking them down...? Mayweather is just not a devastating offensive fighter at elite level. Mayweather is a compubox fighter, a computer stats fighter, good at scoring points.
I thought Mayweather was really nervous at the weigh in, all that chewing of gum is a sign of serious tension.